GB696126A - Improvements in magnets with annular gaps - Google Patents

Improvements in magnets with annular gaps

Info

Publication number
GB696126A
GB696126A GB843250A GB843250A GB696126A GB 696126 A GB696126 A GB 696126A GB 843250 A GB843250 A GB 843250A GB 843250 A GB843250 A GB 843250A GB 696126 A GB696126 A GB 696126A
Authority
GB
United Kingdom
Prior art keywords
polepiece
parts
air gap
spacing
magnets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB843250A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PAUL GUSTAVUS ADOLPHUS HELMUTH
Original Assignee
PAUL GUSTAVUS ADOLPHUS HELMUTH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by PAUL GUSTAVUS ADOLPHUS HELMUTH filed Critical PAUL GUSTAVUS ADOLPHUS HELMUTH
Priority to GB843250A priority Critical patent/GB696126A/en
Publication of GB696126A publication Critical patent/GB696126A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

696,126. Permanent magnets. VOIGT, P. G. A. H. May 7, 1951 [April 4, 1950], No. 8432/50. Class 35. A loud-speaker magnet structure with an annular air gap 2 has a spacing arrangement for the latter comprising two parts, viz. an outer washer-like member 5 fixed to the outer polepiece 3, and an inner ring 8 placed around the inner pole stem 9, both parts 5, 8 being of non- magnetic material. The polepiece 3 and the spacing member 5 are bored together. The inner spacing member 8 is preferably made of copper and it is placed on a step 11 formed at the foot of the pole stem 1. Instead of one such step, there may be two steps 11a, 11b, Fig. 3. In order to minimize air cushioning inside the air gap, a wedge-shaped space 6 is provided between the curved edge of polepiece 3 and spacer 5. Alternatively or additionally, air vent(s) as holes or slots can be provided in the outer member. Specifications 383,480, [Group XXXIX], and 625,591 are referred to.
GB843250A 1950-04-04 1950-04-04 Improvements in magnets with annular gaps Expired GB696126A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB843250A GB696126A (en) 1950-04-04 1950-04-04 Improvements in magnets with annular gaps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB843250A GB696126A (en) 1950-04-04 1950-04-04 Improvements in magnets with annular gaps

Publications (1)

Publication Number Publication Date
GB696126A true GB696126A (en) 1953-08-26

Family

ID=9852383

Family Applications (1)

Application Number Title Priority Date Filing Date
GB843250A Expired GB696126A (en) 1950-04-04 1950-04-04 Improvements in magnets with annular gaps

Country Status (1)

Country Link
GB (1) GB696126A (en)

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